Atmosphere mesh-belt furnace

The original documentation describes a line built from infeed, pre-firing, sintering, controlled cooling and outfeed, with the mesh belt conveyor and a PID temperature control system.

The product family covers powder-metallurgy sintering, thick-film firing and atmosphere joining as separate configurations. One temperature class does not fit every process.

Selection check: when a mesh belt furnace fits, and when it does not

It fits when: the parts are small, thin or loose and can lie flat on the belt; the process temperature stays at or below 1100 °C; the plant needs continuous, stable, automatic loading and unloading; each zone should be controlled independently.

It does not fit when: process temperature exceeds 1100 °C — this is not a heating limitation but the strength limit of the belt material itself, and exceeding it writes the belt off early; individual parts are heavy or loads are concentrated — the belt is the load-bearing element and a point load will collapse it locally; the process calls for long holds at high temperature under heavy load.

The one-line test: the cost of a mesh belt furnace is not in the furnace, it is in the belt. Ask first how long the belt will survive at that temperature.

How the specification is fixed: work back from the material

1. Fix the belt material before talking about temperature. The grade sets the long-term working temperature and the load capacity — this is the primary constraint on the whole machine.
2. Belt width and line speed. Width sets how many parts fit across; line speed together with furnace length sets the holding time.
3. Independent control points. Each control point on this model is controlled separately, which allows a multi-step profile — the key requirement for thin, small parts.
4. Atmosphere. The specification lists vacuum, oxidising, inert and reducing. Whether vacuum is genuinely needed has to be confirmed with the process: belt heat transfer and belt life under vacuum are design-critical, and an atmospheric model cannot simply be re-labelled.

Common questions

Q: Why is the limit only 1100 °C? The limit comes from the belt, not the heating elements. The elements listed for this model could support higher temperatures, but the load carrier cannot. Higher temperature means changing the carrier principle — rollers or pusher plates.

Q: How often does the belt have to be replaced? Judge on operating hours, temperature, atmosphere and load together; there is no single answer. What is certain is that over-temperature operation, rapid heating and cooling, and local overload are the three main causes of short life.

Q: Will thin parts drift or overlap on the belt? Yes. That is why the loading method and the belt tensioning arrangement have to be designed together — in practice this affects yield more than the furnace body does.